Voicethread is a cool program that allows you to add comments to digital photos. I used Voicethread to add audio to photos I took during a visit to the Hartwick Pines State Park, which is located in Grayling, Michigan.
Voicethread allows others to add their comments to your narrated slides as well. You can view my Hartwick Pines Voicethread:
What is a Voicethread? It can house an entire group discussion. To see an example, watch this video.
Voicethread costs about $60 a year for a professional or a class subscription. Educators can have up to 2 GB free, and anyone can get up to 3 Voicethreads free of charge. You can find out more about pricing here.
Updated to add: Here is a resource that discusses using Voicethread for assessment. This involves an art teacher.










